気孔生成におよぼす被覆アーク溶接棒の吸湿量の影響 : 軟鋼溶接部の気孔生成におよぼす被覆アーク溶接棒の吸湿の影響(第 1 報)

概要

論文の詳細を見る
The influence of absorbed water of coated electrodes on porosity of weld metals were experimentaly investigated by bead on plate and horizontal fillet welding, using various types of coated flux with various water contents. The experimental results were as follows : 1) Ilmenite, lime-titania, high cellulose, high titanium oxide and iron-powder iron oxide type electrodes were not influenced very much by absorbed water of coated electrodes on porosity of weld metals and sound weld metals were obtained in the all experimental range of absorbed water contents. 2) In the case of low-hydrogen type electrode the porosity of weld metal began to occur when absorbed water content of coated electrode was over about 1.3% and remarkably increased in proportion to the amount of absorbed water contents. 3) Diffusible hydrogen content of weld metal by low-hydrogen type electrode, in which porosity began to occur, was about 7cc/100g. This diffusible hydrogen content was smaller than that of sound weld metals by dried other coated electrodes, which was about 32.7∿45.0cc/100g.
社団法人溶接学会の論文
1978-09-05